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Medicine & Health / Genetics news 1234

Genetic variations put youth at higher risk for lifetime of tobacco addiction

July 11, 2008 | User rating: not shown ( 1 vote(s) ) | No comments yet

Common genetic variations affecting nicotine receptors in the nervous system can significantly increase the chance that European Americans who begin smoking by age 17 will struggle with lifelong nicotine addiction, according ...


Enzyme key to 'sister act' that maintains genome stability

July 10, 2008 | User rating: not shown ( 1 vote(s) ) | No comments yet

Keeping the genome stable is a "sister act" of matched chromatids – the pairs of the double helix DNA molecule that exist during the chromosome duplication in the S phase of the cell cycle.


Herceptin targets breast cancer stem cells

July 09, 2008 | User rating: not rated yet | User comments: 1

A gene that is overexpressed in 20 percent of breast cancers increases the number of cancer stem cells, the cells that fuel a tumor's growth and spread, according to a new study from the University of Michigan Comprehensive ...


Researchers reveal types of genes necessary for brain development

July 07, 2008 | User rating: not shown ( 4 vote(s) ) | No comments yet

Researchers from Harvard Medical School and Brandeis University have successfully completed a full-genome RNAi screen in neurons, showing what types of genes are necessary for brain development. Details of the screen and ...


Common mutations linked to common obesity in Europeans

July 07, 2008 | User rating: 4.2 / 5 after 13 vote(s) | No comments yet

Scientists have discovered two common genetic mutations in people of European ancestry, which affect the production of several hormones controlling our appetite. The mutations have a significant effect on ...


Researchers identify new targets for RNAs that regulate genes

July 06, 2008 | User rating: 5 / 5 after 11 vote(s) | User comments: 1

Tiny strands of genetic material called RNA – a chemical cousin of DNA – are emerging as major players in gene regulation, the process inside cells that drives all biology and that scientists seek to control ...


15 human genomes each week

July 02, 2008 | User rating: 4.8 / 5 after 23 vote(s) | User comments: 2

The Wellcome Trust Sanger Institute has sequenced the equivalent of 300 human genomes in just over six months. The Institute has just reached the staggering total of 1,000,000,000,000 letters of genetic code that will be ...


Complexity of Crohn's disease revealed as 'gene' count tops 30

June 29, 2008 | User rating: 4.6 / 5 after 8 vote(s) | No comments yet

New research has trebled the number of genetic regions known to be implicated in Crohn's disease, a form of inflammatory bowel disease, to over thirty. The research, published today in the journal Nature Genetics, ...


Homosexual behavior due to genetics and environmental factors

June 29, 2008 | User rating: 4.4 / 5 after 38 vote(s) | User comments: 6

Homosexual behaviour is largely shaped by genetics and random environmental factors, according to findings from the world's largest study of twins.


Lack of fragile X and related gene fractures sleep

June 26, 2008 | User rating: not shown ( 3 vote(s) ) | No comments yet

Lack of both the fragile X syndrome gene and one that is related could account for sleep problems associated with the disorder, which is the common cause of inherited mental impairment, said a consortium of researchers led ...


NYU biologists show how eye's neurons switch functions during metamorphosis

June 25, 2008 | User rating: not shown ( 2 vote(s) ) | No comments yet

Researchers at New York University's Center for Developmental Genetics report that the photoreceptors in an insect's eye can change their traditional functions during metamorphosis. The study appears in the most recent issue ...


Our genome changes over lifetime, Johns Hopkins experts say

June 25, 2008 | User rating: 4.8 / 5 after 32 vote(s) | No comments yet

May explain many 'late-onset' diseases
Researchers at Johns Hopkins have found that epigenetic marks on DNA-chemical marks other than the DNA sequence-do indeed change over a person's lifetime, and that the degree ...


Newly identified role for 'power plants' in human cells could lead to targeted therapies

June 24, 2008 | User rating: not shown ( 4 vote(s) ) | No comments yet

Scientists have determined that human cells are able to shift important gene products into their own mitochondria, considered the power plants of cells. The finding could eventually lead to therapies for dozens of diseases.


Eczema in infancy may be linked to cat ownership in those with a specific gene mutation

June 24, 2008 | User rating: not rated yet | No comments yet

A gene mutation and cat exposure at birth may increase a child's risk of developing eczema during their first year according to a study published in PLoS Medicine this week. Researchers led by Professor Hans Bisgaard ...


New paradigm for cell-specific gene delivery

June 23, 2008 | User rating: not shown ( 2 vote(s) ) | No comments yet

Researchers from Northwestern University and Texas A & M University have discovered a new way to limit gene transfer and expression to specific tissues in animals. In studies to determine how plasmids enter the nuclei of ...


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